US4613634A
Expired / Lapsed
US
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Low warp filled polyoxymethylene compositions
Assignee: Celanese Corp
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Filing: 1985-09-13
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Granted: 1986-09-23
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Expires: 2005-09-13
Abstract
Abstract A low warp, filled oxymethylene polymer composition which when molded into products, exhibits improved surface appearance and low warpage as compared to products molded from glass fiber filled oxymethylene polymer compositions. The composition contains an oxymethylene polymer, a minor proportion of a phenoxy resin which is a compound of the formula: ##STR1## and glass beads.
Inventors
- 👤 Derrick B. McKie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:31
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/16; C08K7/18; C08K7/20; C08L; C08L59/00; C08L59/02; C08L71/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
140 words
A low warp, filled oxymethylene polymer composition comprising a normally solid oxymethylene polymer having an inherent viscosity of at least 1.0 (measured at 60° C. in a 0.1 weight percent solution in p-chlorophenol containing 2 weight percent of alpha-pinene), a molecular weight of at least 10,000 and a melting point of at least 150° C., in an amount of from about 40 to about 99 wt.% of the total composition, glass beads in an amount of from about 1 to about 60 wt.% of the total composition, having an average bead diameter distribution of from greater than 0 up to about 300 microns, and a thermoplastic phenoxy resin having a repeating structure: ##STR7## and an average molecular weight range from about 15,000 to about 75,000, in an amount of from about 0.1 to about 5 wt.% of the total composition.
Claim 2
Dependent Claim
140 words
A low warp, filled oxymethylene polymer composition comprising a normally solid oxymethylene polymer having an inherent viscosity of at least 1.0 (measured at 60° C. in a 0.1 weight percent solution in p-chlorophenol containing 2 weight percent of alpha-pinene), a molecular weight of at least 10,000 and a melting point of at least 150° C., in an amount of from about 40 to about 99 wt.% of the total composition, glass beads in an amount of from about 1 to about 60 wt.% of the total composition, having an average bead diameter distribution of from greater than 0 up to about 300 microns, and a thermoplastic phenoxy resin having a repeating structure: ##STR7## and an average molecular weight range from about 15,000 to about 75,000, in an amount of from about 0.1 to about 5 wt.% of the total composition.
Claim 3
Dependent Claim
19 words
The composition of claim 1 wherein the amount of glass beads ranges from about 10 to about 40 wt.%.
Claim 4
Dependent Claim
25 words
The composition of claim 1 wherein the glass beads have an average bead diameter distribution of from greater than 0 up to about 100 microns.
Claim 5
Dependent Claim
25 words
The composition of claim 1 wherein the glass beads have an average bead diameter distribution of from greater than 0 up to about 88 microns.
Claim 6
Dependent Claim
19 words
The composition of claim 4 wherein the amount of glass beads ranges from about 15 to about 35 wt.%.
Claim 7
Dependent Claim
13 words
The composition of claim 1 wherein the oxymethylene polymer is a capped homopolymer.
Claim 8
Dependent Claim
28 words
The composition of claim 1 wherein the oxymethylene polymer is an oxymethylene copolymer comprising from about 85 mole percent to 99.9 mole percent recurring --OCH 2 -- groups.
Claim 9
Dependent Claim
23 words
The composition of claim 1 wherein the amount of phenoxy resin ranges from about 0.2 about 2 wt. % of the total composition.
Claim 10
Dependent Claim
53 words
The composition of claim 1 wherein the oxymethylene polymer is an oxymethylene copolymer having a structure comprising recurring units having the formula --O--CH 2 --(CH 2 ) n ) wherein n is an integer from zero to 2 and wherein n is zero in from 60 to 99.6 percent of the recurring units.
Claim 11
Dependent Claim
24 words
The composition of claim 1, 7 or 9 wherein the phenoxy resin has an average molecular weight ranging from about 20,000 to about 50,000.
References Cited (Backward Citations)
US2989506A
Cited
US2989509A
Cited
US3027352A
Cited
US3174948A
Cited
US3254053A
Cited
US3318848A
Cited
US3455867A
Cited
US3450665A
Cited
US3356646A
Cited
US3631124A
Cited
US3848021A
Cited
SU433186A1
Cited
US3901846A
Cited
US4427807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-22 | 1990-03-24 | 1990-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-22 | 1994-03-24 | 1994-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-22 | 1998-03-24 | 1998-09-23 | $7700.00 | Window Closed / Lapsed |